[PATCH v1] cmd: hash: fix param count check

[Igor Opaniuk]

From: Igor Opaniuk <igor.opaniuk at gmail.com>

Add correct check for parameter count.

This fixes this issue when `hash` cmd is invoked without params:

=> hash
data abort
pc : [<bf739204>]	   lr : [<ba6effa8>]
reloc pc : [<60019204>]	   lr : [<5afcffa8>]
sp : ba6dd9c8  ip : bf7391f0	 fp : bf74ec14
r10: 00000001  r9 : ba6dfea0	 r8 : bf7ea030
r7 : 00000000  r6 : ba6effa8	 r5 : 00000000  r4 : ffffffff
r3 : bf7c257c  r2 : 00000001	 r1 : 00000000  r0 : bf7e6e34
Flags: nZCv  IRQs off  FIQs on  Mode SVC_32
Code: e5934004 e1a0e003 e59f3050 e2444001 (e5f4c001)
Resetting CPU ...

resetting ...

Signed-off-by: Igor Opaniuk <igor.opaniuk at gmail.com>
---

 cmd/hash.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/cmd/hash.c b/cmd/hash.c
index e163cd67742..5534a735fa7 100644
--- a/cmd/hash.c
+++ b/cmd/hash.c
@@ -14,15 +14,22 @@
 #include <hash.h>
 #include <linux/ctype.h>
 
+#if IS_ENABLED(CONFIG_HASH_VERIFY)
+#define HARGS 6
+#else
+#define HARGS 5
+#endif
+
 static int do_hash(struct cmd_tbl *cmdtp, int flag, int argc,
 		   char *const argv[])
 {
 	char *s;
 	int flags = HASH_FLAG_ENV;
 
-#ifdef CONFIG_HASH_VERIFY
-	if (argc < 4)
+	if (argc < (HARGS - 1))
 		return CMD_RET_USAGE;
+
+#if IS_ENABLED(CONFIG_HASH_VERIFY)
 	if (!strcmp(argv[1], "-v")) {
 		flags |= HASH_FLAG_VERIFY;
 		argc--;
@@ -37,18 +44,12 @@ static int do_hash(struct cmd_tbl *cmdtp, int flag, int argc,
 	return hash_command(*argv, flags, cmdtp, flag, argc - 1, argv + 1);
 }
 
-#ifdef CONFIG_HASH_VERIFY
-#define HARGS 6
-#else
-#define HARGS 5
-#endif
-
 U_BOOT_CMD(
 	hash,	HARGS,	1,	do_hash,
 	"compute hash message digest",
 	"algorithm address count [[*]hash_dest]\n"
 		"    - compute message digest [save to env var / *address]"
-#ifdef CONFIG_HASH_VERIFY
+#if IS_ENABLED(CONFIG_HASH_VERIFY)
 	"\nhash -v algorithm address count [*]hash\n"
 		"    - verify message digest of memory area to immediate value, \n"
 		"      env var or *address"
-- 
2.34.1